#ifndef __VMM_EMULATE_H
#define __VMM_EMULATE_H
+
+#ifdef __V3VEE__
+
#include <palacios/vm_guest.h>
#include <palacios/vmm.h>
* We can parse out the instruction prefixes, as well as decode the operands
*/
-typedef enum {INVALID_OPERAND, REG_OPERAND, MEM_OPERAND} operand_type_t;
-int parse();
+
+typedef enum {INVALID_OPERAND, REG_OPERAND, MEM_OPERAND} operand_type_t;
+
struct x86_operand {
addr_t operand;
uint_t size;
};
struct x86_prefix_list {
- uint_t lock : 1;
+ uint_t lock : 1; // 0xF0
+ uint_t repne : 1; // 0xF2
+ uint_t repnz : 1; // 0xF2
+ uint_t rep : 1; // 0xF3
+ uint_t repe : 1; // 0xF3
+ uint_t repz : 1; // 0xF3
+ uint_t cs_override : 1; // 0x2E
+ uint_t ss_override : 1; // 0x36
+ uint_t ds_override : 1; // 0x3E
+ uint_t es_override : 1; // 0x26
+ uint_t fs_override : 1; // 0x64
+ uint_t gs_override : 1; // 0x65
+ uint_t br_not_taken : 1; // 0x2E
+ uint_t br_takend : 1; // 0x3E
+ uint_t op_size : 1; // 0x66
+ uint_t addr_size : 1; // 0x67
};
-/* This parses an instruction
+
+struct x86_instr {
+ uint_t instr_length;
+ addr_t opcode; // a pointer to the V3_OPCODE_[*] arrays defined below
+ uint_t num_operands;
+ struct x86_prefix_list prefixes;
+ struct x86_operand first_operand;
+ struct x86_operand second_operand;
+ struct x86_operand third_operand;
+ void * decoder_data;
+};
+
+
+ /************************/
+ /* EXTERNAL DECODER API */
+/************************/
+/*
+ This is an External API definition that must be implemented by a decoder
+*/
+
+
+/*
+ * Initializes a decoder
+ */
+int init_decoder();
+
+/*
+ * Decodes an instruction
* All addresses in arguments are in the host address space
+ * instr_ptr is the host address of the instruction
+ * IMPORTANT: make sure the instr_ptr is in contiguous host memory
+ * ie. Copy it to a buffer before the call
*/
-int v3_parse_instr(struct guest_info * info, // input
- char * instr_ptr, // input
- uint_t * instr_length, // output
- addr_t * opcode, // output
- uint_t * opcode_length, // output
- struct x86_prefix_list * prefixes, // output
- struct x86_operand * src_operand, // output
- struct x86_operand * dst_operand, // output
- struct x86_operand * extra_operand); // output
-
+int v3_decode(struct guest_info * info, addr_t instr_ptr, struct x86_instr * instr);
+
+/*
+ * Encodes an instruction
+ * All addresses in arguments are in the host address space
+ * The instruction is encoded from the struct, and copied into a 15 byte host buffer
+ * referenced by instr_buf
+ * any unused bytes at the end of instr_buf will be filled with nops
+ * IMPORTANT: instr_buf must be allocated and 15 bytes long
+ */
+int v3_encode(struct guest_info * info, struct x86_instr * instr, char * instr_buf);
+
+
+
+
+
+
+
/*
-#define MAKE_INSTR(nm, ...) static const uchar_t OPCODE_##nm[] = { __VA_ARGS__ }
+#define MAKE_INSTR(nm, ...) static const uchar_t V3_OPCODE_##nm[] = { __VA_ARGS__ }
/*
* Here's how it works:
operand_type_t addr_type = INVALID_OPERAND;
char * instr_cursor = modrm_instr;
- PrintDebug("ModRM mod=%d\n", modrm->mod);
+ // PrintDebug("ModRM mod=%d\n", modrm->mod);
instr_cursor += 1;
if (modrm->mod == 3) {
mod_mode = REG;
addr_type = REG_OPERAND;
- PrintDebug("first operand = Register (RM=%d)\n",modrm->rm);
+ //PrintDebug("first operand = Register (RM=%d)\n",modrm->rm);
*first_operand = decode_register(gprs, modrm->rm, reg_size);
mod_mode = REG;
addr_type = REG_OPERAND;
- PrintDebug("first operand = Register (RM=%d)\n",modrm->rm);
+ // PrintDebug("first operand = Register (RM=%d)\n",modrm->rm);
*first_operand = decode_register(gprs, modrm->rm, reg_size);
+#endif // !__V3VEE__
+
#endif
